Bug #71093 [Opn->Nab]: GD: Very high memory consumption with bundled library 2.1.0

Edit report at https://bugs.php.net/bug.php?id=71093&edit=1 ID: 71093 Updated by: pajoye@php.net Reported by: jeep dot gaudreau at gmail dot com Summary: GD: Very high memory consumption with bundled library 2.1.0 -Status: Open +Status: Not a bug Type: Bug Package: GD related Operating System: Fedora 23 PHP Version: 5.6.16 Block user comment: N Private report: N New Comment: Both bundled or system library will use the same amount of memory (as explained by Danak). The bundled library uses the php memory management system while the system library does not. It explains why get_memory_usage will show different values. Use a ps or other to see how much memory is used by the php process and you will see the actual usage (php and all libs). Previous Comments: ------------------------------------------------------------------------ [2015-12-12 03:24:17] danack@php.net The linked image has dimensions of 16,313 x 3,621. With 4 bytes per pixel, this comes to 236,277,492 bytes of image data. This is much bigger than the jpeg file size, because the JPEG file holds compressed data, whereas GD has to decompress the data to be able to use it. I'm not sure what is happening to make it look like "not more than a few KB" of memory is being used in other scenarios, but it sounds like that something is misleading you, as it is normal for large amounts of memory to be used, when a large image is being converted. ------------------------------------------------------------------------ [2015-12-11 14:38:21] jeep dot gaudreau at gmail dot com Description: ------------ I found out that the GD library bundled with PHP 5.6.16 (version 2.1.0) is using a lot of memory when calling functions "imagecreatefromjpeg" or "imagecreatefromstring" on JPEG files. A JPEG file of about 4MB can generate up to 300MB of memory while it take not more than a few KB when using the OS package of GD version 2.1.1. I can also reproduce the bug on RHEL6.5 Maybe the solution would only be to upgrade the bundled PHP GD library to 2.1.1. Here's the GD info when memory consumption is very high : GD Support enabled GD Version bundled (2.1.0 compatible) FreeType Support enabled FreeType Linkage with freetype FreeType Version 2.6.0 T1Lib Support enabled GIF Read Support enabled GIF Create Support enabled JPEG Support enabled libJPEG Version 6b PNG Support enabled libPNG Version 1.6.19 WBMP Support enabled XPM Support enabled libXpm Version 30411 XBM Support enabled WebP Support enabled GD Support enabled Here's the GD info when memory consumption is low : GD headers Version 2.1.1 GD library Version 2.1.1 FreeType Support enabled FreeType Linkage with freetype FreeType Version 2.6.0 T1Lib Support enabled GIF Read Support enabled GIF Create Support enabled JPEG Support enabled libJPEG Version 6b PNG Support enabled libPNG Version 1.6.19 WBMP Support enabled XPM Support enabled libXpm Version 30411 XBM Support enabled WebP Support enabled Test script: --------------- Very easy to reproduce: * Create the following PHP script: <?php $path = 'img.jpg'; //$image = imagecreatefromjpeg($path); $image = imagecreatefromstring(file_get_contents($path)); var_dump(memory_get_usage()); * Execute with the following JPEG image: https://drive.google.com/open?id=0B0H8CbGn160eMHg3cGZrSmtzRTA You should have very high memory usage with bundled library 2.1.0 You should have very low memory usage with OS package GD version 2.1.1 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=71093&edit=1